Pen



FIG. 1 is a perspective view of the pen, showing my new design

FIG. 2 is a bottom plan view of the pen;

FIG. 3 is a right side elevational view of the pen;

FIG. 4 is a left side elevational view of the pen;

FIG. 5 is a front elevational view of the pen; and,

FIG. 6 is a rear elevational view of the pen. 

The ornamental design for the pen, as shown. 